How can I do an UPDATE statement with JOIN in SQL Server?

Question

I need to update this table in SQL Server with data from its \'parent\' table, see below:

Table: sale

id (int)
udid         


        

Answer 1

Another example why SQL isn't really portable.

For MySQL it would be:

update ud, sale
set ud.assid = sale.assid
where sale.udid = ud.id;

For more info read multiple table update: http://dev.mysql.com/doc/refman/5.0/en/update.html

UPDATE [LOW_PRIORITY] [IGNORE] table_references
    SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ...
    [WHERE where_condition]